Kawasaki, Japan

Hiromasa Amma

This inventor holds 63 USPTO granted patents and 5 published patent applications, plus 1 CIPO patent and 6 EPO patents, primarily in Liquid Ejection Technology (CPC class B41J). Top assignee: Canon Kabushiki Kaisha. Active years: 2006-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiromasa Amma. Retrieved from https://idiyas.com/inventor/hiromasa-amma

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 63 

% Patents Active = 73.0


 

Average Co-Inventor Count = 4.4

ph-index = 7

Forward Citations = 238(Granted Patents)

Forward Citations (Not Self Cited) = 184(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kanawaga, JP (2006)
  • Tokyo, JP (2006 - 2007)
  • Kawasaki, JP (2008 - 2021)
  • Kanagawa, JP (2006 - 2023)

Company Filing History:


Years Active: 2006-2026

Loading Chart...
Loading Chart...
Loading Chart...
Areas of Expertise:
Liquid Ejection Head
Manufacturing Method
Inkjet Printing
Liquid Supply Member
Resin Molding
Liquid Ejecting Apparatus
Flow Path Member
Circuit Board
Attachment Assembly
Molded Part
Liquid Discharge Head
Liquid Ejection Apparatus
63 patents (USPTO):Explore Patents

Title: Innovations By Hiromasa Amma – A Pioneer in Liquid Ejection Technology

Introduction

Hiromasa Amma, an inventive mind based in Kawasaki, Japan, has significantly contributed to the field of liquid ejection technology. With an impressive portfolio of 60 patents, his work reflects a deep commitment to enhancing the capabilities of liquid ejection systems in various applications.

Latest Patents

Among his recent innovations, Amma has developed two notable patents related to liquid ejection heads and apparatuses. The first patent focuses on a liquid ejection head designed to minimize the separation of ejection modules from their support member. This is achieved by carefully aligning a liquid supply unit with the support member that holds the ejection modules. The connection unit between the ejection unit and the liquid supply unit is specifically engineered to allow for relative movement, thus enhancing functionality.

The second patent reinforces this technology by incorporating a guide part upstream of the liquid ejection part. This guide part effectively directs the front end of the recording medium toward the liquid ejection section, utilizing an inclined surface to maintain optimal spacing from the conveyance path as it moves further from the liquid ejection part.

Career Highlights

Hiromasa Amma is currently associated with Canon Kabushiki Kaisha, a leading multinational corporation specializing in imaging and optical products. His innovative work has positioned him as a vital contributor within the organization, driving advancements in printing and liquid ejection technologies.

Collaborations

Throughout his career, Amma has collaborated with notable colleagues, including Takuya Iwano and Yukuo Yamaguchi. Their combined efforts have led to breakthroughs in liquid ejection technology, reinforcing Canon’s leadership in this competitive sector.

Conclusion

Hiromasa Amma's contributions to liquid ejection technology underscore the importance of innovation in advancing industrial applications. With a robust patent portfolio and collaborative spirit, he continues to push the boundaries of what is possible in liquid ejection systems, paving the way for future advancements in this vital field.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…